diff --git a/corrlib/meas_io.py b/corrlib/meas_io.py
index be80b6f..de19727 100644
--- a/corrlib/meas_io.py
+++ b/corrlib/meas_io.py
@@ -195,7 +195,7 @@ def cache_dir(path: Path, file: str) -> Path:
         The path holding the cached data for the given file.
     """
     cache_path_list = file.split("/")[1:]
-    cache_path = path / CACHE_DIR
+    cache_path = Path(path) / CACHE_DIR
     for directory in cache_path_list:
         cache_path /= directory
     return cache_path